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Patent US2494574A successfully refreshed from Google Patents.
US2494574A
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Coupling device
Assignee: Individual
•
Filing: 1947-06-02
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Granted: 1950-01-17
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Expires: 1967-06-02
Abstract
No abstract record available.
Inventors
- 👤 James F Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:58
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/006; F; F16; F16B; F16B2200/00; F16B2200/50; F16B2200/503; F16B2200/506
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1405921A
Cited
US2019463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |